{"id":3225,"date":"2021-01-21T09:45:58","date_gmt":"2021-01-21T08:45:58","guid":{"rendered":"https:\/\/www.redhillballs.com\/?page_id=3225"},"modified":"2025-10-13T08:16:12","modified_gmt":"2025-10-13T06:16:12","slug":"role-cu-ace-nra-cu-capete-sferice","status":"publish","type":"page","link":"https:\/\/www.redhillballs.com\/ro\/produsele\/role-cilindrice-si-cu-ace\/role-cu-ace-nra-cu-capete-sferice\/","title":{"rendered":"Role cu ace NRA cu capete sferice"},"content":{"rendered":"<h2>\ud83d\udee0\ufe0f <a href=\"https:\/\/en.wikipedia.org\/wiki\/Needle_roller_bearing?utm_source=chatgpt.com\">Role cu ace NRA cu capete sferice \u2013 Role cu capete rotunjite pentru ansambluri compacte \u0219i cu sarcini mari<\/a><\/h2>\n<p>Role cu ace NRA cu capete sferice sunt elemente cu capete rotunjite utilizate \u00een cu\u0219ti de precizie \u0219i ansambluri de rulmen\u021bi cu ace, acolo unde sarcinile radiale mari, frecarea redus\u0103 \u0219i gabaritul compact sunt esen\u021biale. Capetele sferice (rotunjite) reduc tensiunile de margine \u0219i ajut\u0103 la distribu\u021bia lubrifiantului, asigur\u00e2nd func\u021bionare lin\u0103 \u0219i durat\u0103 de via\u021b\u0103 \u00eendelungat\u0103 \u00een cutii de viteze, transmisii, mi\u0219care liniar\u0103 \u0219i alte sisteme de control al mi\u0219c\u0103rii.<\/p>\n<h3>\ud83d\udd27 Specifica\u021bii tehnice cheie<\/h3>\n<ul>\n<li><strong>Geometria capetelor<\/strong>: NRA = capete sferice\/rotunjite pentru o mai bun\u0103 distribu\u021bie a sarcinii \u0219i curgere a lubrifiantului fa\u021b\u0103 de capetele plane.<\/li>\n<li><strong>Standarde<\/strong>: Fabricate conform DIN 5402-3 \/ ISO 3096 (clase dimensionale \u0219i de precizie).<\/li>\n<li><strong>Materiale<\/strong>: O\u021bel rulment crom 100Cr6 (AISI 52100); op\u021biuni inox (AISI 420C\/440C) \u0219i ceramic\u0103\/carburi tehnice la cerere.<\/li>\n<li><strong>Duritate (AISI 52100)<\/strong>: ~60\u201366 HRC dup\u0103 tratament termic.<\/li>\n<li><strong>Dimensiuni tipice<\/strong>: Diametru Dw \u2248 1,0\u20136,0 mm; lungime Lw \u2248 5,8\u201359,8 mm (alte dimensiuni conform desen).<\/li>\n<li><strong>Toleran\u021be tipice<\/strong>: Diametru 0\/\u221210 \u00b5m; clase de precizie G2, G3, G5 (conform ISO 3096\/DIN 5402-3).<\/li>\n<\/ul>\n<h3>\u2705 Avantaje<\/h3>\n<ul>\n<li><strong>Capacitate radial\u0103 ridicat\u0103<\/strong> cu sec\u021biune minim\u0103 pentru designuri compacte.<\/li>\n<li><strong>Tensiuni de margine reduse &amp; lubrifiere mai uniform\u0103<\/strong> datorit\u0103 capetelor sferice (fiabilitate sporit\u0103 la nealiniere).<\/li>\n<li><strong>Calitatea suprafe\u021bei<\/strong> \u0219i sortarea str\u00e2ns\u0103 a toleran\u021belor permit frecare mic\u0103 \u0219i b\u0103t\u0103i constante.<\/li>\n<li><strong>Versatilitate de materiale<\/strong> pentru cerin\u021be de uzur\u0103, coroziune sau temperatur\u0103.<\/li>\n<\/ul>\n<h3>\ud83d\udd04 Aplica\u021bii pentru Role cu ace NRA cu capete sferice<\/h3>\n<ul>\n<li><strong>Cu\u0219ti de ace &amp; ansambluri de rulmen\u021bi<\/strong> \u00een reductor, angrenaje planetare &amp; armonice.<\/li>\n<li><strong>Transmisii auto<\/strong> \u0219i subansambluri compacte ale lan\u021bului cinematic.<\/li>\n<li><strong>Ghidoare liniare<\/strong>, ma\u0219ini-unelte, micromotoare \u0219i sisteme de mi\u0219care.<\/li>\n<\/ul>\n<h3>\ud83d\udce6 Clase &amp; dimensiuni disponibile<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><strong>Clase<\/strong>: G2\u2013G5 (conform DIN 5402-3 \/ ISO 3096); selec\u021bii speciale la cerere.<\/li>\n<li><a href=\"https:\/\/www.redhillballs.com\/company\/ball-diameters\/\"><strong>Domeniu diametre<\/strong><\/a>: ~1,0\u20136,0 mm (tip NRA); <strong>Lungimi<\/strong>: ~5,8\u201359,8 mm.<\/li>\n<li><strong>Tipuri<\/strong>: NRA (capete sferice)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-252\" src=\"https:\/\/www.redhillballs.com\/wp-content\/uploads\/2021\/01\/needle-roller-nra-spherical-ends.jpg\" alt=\"\" width=\"400\" height=\"196\" srcset=\"https:\/\/www.redhillballs.com\/wp-content\/uploads\/2021\/01\/needle-roller-nra-spherical-ends.jpg 400w, https:\/\/www.redhillballs.com\/wp-content\/uploads\/2021\/01\/needle-roller-nra-spherical-ends-300x147.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\ud83d\udee0\ufe0f Role cu ace NRA cu capete sferice \u2013 Role cu capete rotunjite pentru ansambluri compacte \u0219i cu sarcini mari Role cu ace NRA cu capete sferice sunt elemente cu capete rotunjite utilizate \u00een cu\u0219ti de precizie \u0219i ansambluri de rulmen\u021bi cu ace, acolo unde sarcinile radiale mari, frecarea redus\u0103 \u0219i gabaritul compact sunt esen\u021biale. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6976,"parent":3223,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-3225","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Role cu ace NRA cu capete sferice \u2013 precizie \u0219i rezisten\u021b\u0103<\/title>\n<meta name=\"description\" content=\"Role cu ace NRA cu capete sferice asigur\u0103 mi\u0219care lin\u0103, durabilitate \u0219i stabilitate pentru rulmen\u021bi, mecanisme \u0219i aplica\u021bii de precizie.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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